NEWER RESULTS IN MORPHOGENETIC STUDIES OF FLOWER ON APRICOT VARIETIES

According to the former elaborated method in observations carried out for a period of five years we succeeded to explain the most interesting varietal characteristics, their sensitivity concerning age group and ecology. Altogether 10 morphogenetic features (without the length of filaments) have been evaluated, and among then the correlations of as few series of data gave us the possibility to draw further conclusions. The interval of examined features in each varietal group depends on their place of origin as well, that is foreign varieties were more sensitive than natives. Variability is great concerning calyx tube diameter, the medium of petal among the introduced varieties, respectively concerning pistil length, pollen germination and relative stamen number in case of Hungarian cultivars. In general, the diameter of stigma and pollen germination of foreign varieties, the medial size of petal in native varieties surpassed significantly the varieties belonging to the other group.

Far less incomplete and double-pistil flowers were developed by native apricots, though some varieties inclined to it in the same way as to leaved filaments and anthers. Among the correlative affects the most important are those, which help and influence successful visiting the flowers by the bees/ as a result of the role played in fertilization and of aptness of the flowers to feed the bees. Median size of petal and relative stamen number respectively the positive relationship between calyx tube diameter and median size of petal can help further investigation regarding both production (i.e. fertilization) and evolutional biological standpoints.

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